You're on the right track. All you need to do, is prove that you've had consistant pain, for a period longer than 3 months, thats what chronic pain is.

Plus if you dont have a lot of income (ie. low income, under 20,000/year) you can be approved for a discount visit at the THCF office. It will only be $150.00. They do everything they can to help out people with disabilities.